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KR0182717B1 - Outdoor Fan Control Unit of Air Conditioner - Google Patents

Outdoor Fan Control Unit of Air Conditioner
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KR0182717B1
KR0182717B1KR1019960004227AKR19960004227AKR0182717B1KR 0182717 B1KR0182717 B1KR 0182717B1KR 1019960004227 AKR1019960004227 AKR 1019960004227AKR 19960004227 AKR19960004227 AKR 19960004227AKR 0182717 B1KR0182717 B1KR 0182717B1
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temperature
compressor
outdoor fan
operating frequency
condenser
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KR970062567A (en
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정상진
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김광호
삼성전자주식회사
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Abstract

Translated fromKorean

본 발명의 실외팬제어장치는 실외의 공기와 열교환되는 응축기 및 상기 응축기로 고온고압의 냉매를 유입시키는 압축기(61)와, 상기 압축기(61)로부터 상기 응축기내로 유입된 고온고압의 냉매와 실외공기의 열교환을 촉진시키는 실외팬(71), 직류전원을 소정의 주파수를 가진 3상 교류전원으로 변환하여 상기 압축기(61) 및 상기 실외팬(71)에 입력시킴으로써 상기 압축기(61) 및 상기 실외팬(71)을 가변구동시키도록 하는 인버터(60,70b)를 구비하여 현재의 실내온도와 사용자가 설정한 설정온도와의 차에 의거하여 상기 압축기(61) 및 상기 실외팬(71)의 운전주파수를 가변시키도록 하는 공기조화기에 있어서, 현재의 실내온도와 사용자가 설정한 설정온도와의 차에 의거하여 실내온도와 설정온도와의 온도편차를 산출하고, 실내온도와 설정온도와의 편차가 크면 상기 응축기(61)로 유입되는 냉매의 온도를 높이기 위하여 운전주파수가 높도록 그리고 편차가 작으면 응축기로 유입되는 냉매의 온도를 상대적으로 덜 높이기 위하여 운전주파수가 낮도록 온도편차에 비례하여 상기 압축기(61)의 운전주파수를 30-120Hz의 범위에서 설정하며, 상기 압축기(61)의 구동속도에 따라 상기 실외팬(71)의 구동속도를 가변시켜 응축기의 열교환효율을 향상시키도록 상기 압축기(61)의 운전주파수에 상기 실외팬(71)의 운전주파수를 동기시키는 제어부를 구비한 것을 특징으로 한다.The outdoor fan control apparatus of the present invention includes a condenser that exchanges heat with outdoor air and a compressor 61 for introducing a high temperature and high pressure refrigerant into the condenser, and a high temperature and high pressure refrigerant and outdoor air introduced into the condenser from the compressor 61. An outdoor fan 71 for promoting heat exchange of the electric power, and converting a DC power source into a three-phase AC power source having a predetermined frequency and inputting the same to the compressor 61 and the outdoor fan 71. Inverters 60 and 70b for variable driving of the drive 71 and operating frequencies of the compressor 61 and the outdoor fan 71 based on the difference between the current indoor temperature and the set temperature set by the user. In the air conditioner to vary the temperature, the temperature deviation between the room temperature and the set temperature is calculated based on the difference between the current room temperature and the set temperature set by the user, and the deviation between the room temperature and the set temperature is large. If the operating frequency is high to increase the temperature of the refrigerant flowing into the condenser 61 and the deviation is small, the compressor is proportional to the temperature deviation so that the operating frequency is low to increase the temperature of the refrigerant flowing into the condenser relatively less. The operating frequency of the 61 is set in the range of 30 to 120 Hz, and the driving speed of the outdoor fan 71 is varied according to the driving speed of the compressor 61 to improve the heat exchange efficiency of the condenser. It characterized in that it comprises a control unit for synchronizing the operating frequency of the outdoor fan (71) to the operating frequency of.

Description

Translated fromKorean
공기조화기의 실외팬제어장치Outdoor Fan Control Unit of Air Conditioner

본 발명은 공기조화기에 관한 것으로, 특히 압축기의 구동주파수를 가변시킬 수 있는 인버터형 공기조화기에 있어서 실외팬을 압축기의 구동주파수와 동일한 주파수로 구동시킬 수 있도록 하는 공기조화기의 실외팬제어장치에 관한 것이다.The present invention relates to an air conditioner, and more particularly, to an outdoor fan control apparatus of an air conditioner that enables an outdoor fan to be driven at the same frequency as a drive frequency of a compressor in an inverter type air conditioner capable of varying a drive frequency of a compressor. It is about.

일반적으로, 공기조화기는 압축기, 실외열교환기, 모세관, 실내열교환기 및 이들을 연결하는 냉매관으로 이루어진 냉각싸이클을 구비하고, 상기 냉각싸이클을 통하여 냉매를 상변환시키는 과정에서 실내의 열을 흡수 또는 방출함으로써 실내를 냉방 또는 난방시키는 기기이다. 공기조화기가 상기와 같이 냉방운전을 수행하는 경우에 통상적으로 실외열교환기는 응축기이고, 실내열교환기는 증발기이다.In general, an air conditioner includes a cooling cycle consisting of a compressor, an outdoor heat exchanger, a capillary tube, an indoor heat exchanger, and a refrigerant pipe connecting them, and absorbs or discharges heat inside the room during the phase conversion of the refrigerant through the cooling cycle. It is a device which cools or heats a room by doing so. When the air conditioner performs the cooling operation as described above, the outdoor heat exchanger is typically a condenser and the indoor heat exchanger is an evaporator.

한편, 설정온도까지의 도달시간을 단축시키는 외에 실내온도와 설정온도와의 편차를 줄이기 위하여, 파워트랜지스터의 조합으로 이루어진 인버터에 의해 압축기구동 전원주파수를 가변시킴으로써, 압축기의 구동능력을 제어하는 인버터형 공기조화기가 개발되었다.On the other hand, in order to shorten the time to reach the set temperature and to reduce the deviation between the room temperature and the set temperature, the inverter drive power is controlled by varying the compressor driving power supply frequency by an inverter composed of a combination of power transistors. Air conditioners have been developed.

이러한 인버터형 공기조화기는 통상적으로 실내기와 실외기가 분리된 구조로 되어 있는 바, 이하에서는 편의상 분리형 공기조화기를 일예로 하여 설명한다.Such an inverter type air conditioner typically has a structure in which an indoor unit and an outdoor unit are separated. Hereinafter, for convenience, a separate type air conditioner will be described.

제1도는 종래의 인버터형 공기조화기의 구성을 나타낸 제어블럭도로서, 이는 냉난방시키고자 하는 실내의 온도를 감지하는 실내온도감지부(20), 사용자로부터 희망하는 실내온도를 설정받는 실내온도설정부(30), 냉방 또는 난방운전 및 토출되는 냉기의 풍량과 풍향 등을 선택받는 기능선택부(30), 냉방 또는 난방운전 및 토출되는 냉기의 풍량과 풍향 등을 선택받는 기능선택부(40), 상기 실내온도감지부(20)에서 감지된 실내온도와 실내온도설정부(30)에 의해 설정된 설정온도를 비교하여 압축기의 운전주파수를 결정하는 실내기제어부(10)로 이루어진 실내기와, 상기 실내기제어부(10)로부터 제어신호를 입력받아 압축기(61) 및 실외팬(71)의 구동을 제어하도록 소정의 제어신호를 출력하는 실외기제어부(50)와 상기 실외기제어부(50)로부터 제어신호를 입력받아 압축기(61)를 소정의 운전주파수로 구동시키는 압축기 구동부(60)와, 상기 실외기제어부(50)의 제어신호를 입력받아 압축기(61)의 구동과 연동되어 실외팬(71)의 구동을 제어하는 실외팬구동부(70a)를 구비한다.1 is a control block diagram showing a configuration of a conventional inverter type air conditioner, which is an indoor temperature sensing unit 20 for detecting a temperature of an indoor room to be cooled and heated, and an indoor temperature setting for setting a desired indoor temperature from a user. The unit 30, the function selection unit for receiving the air volume and the wind direction of the cooling air discharged and cooling operation or discharge 30, the function selection unit 40 for selecting the air flow and the air direction of the cold air discharged or cooling or heating operation An indoor unit comprising an indoor unit controller 10 configured to determine an operating frequency of a compressor by comparing the indoor temperature detected by the indoor temperature detection unit 20 with the set temperature set by the indoor temperature setting unit 30, and the indoor unit controller. Receives a control signal from the outdoor unit controller 50 and the outdoor unit controller 50 for outputting a predetermined control signal to control the driving of the compressor 61 and the outdoor fan 71 by receiving a control signal from the unit 10. The compressor drive unit 60 for driving the compressor 61 at a predetermined operating frequency and the control signal of the outdoor unit controller 50 are input to control the driving of the outdoor fan 71 in cooperation with the drive of the compressor 61. The outdoor fan driving unit 70a is provided.

이러한 구성에 있어서, 종래의 공기조화기는, 제2도에 도시된 바와 같이, 실내의 온도에 따라 압축기의 운전주파수를 가변시키기 위한 압축기 구동부(60) 및 실외팬(71)의 구동을 제어하기 위한 실외팬구동부(70a)를 구비한다. 압축기 구동부(60)는 실내기제어부(10)에 의하여 실내의 공조조건에 따른 압축기의 운전주파수가 결정되면 실외기제어부(50)는 압축기 구동부(60)에 소정의 제어신호를 출력하게 되는데, 이는 미리 프로그램된 타이밍에 의하여 스위칭소자인 6개의 파워트랜지스터의 구동을 스위칭함으로써 상호 120°의 위상차를 갖는 3상의 교류를 발생시켜 압축기(61)를 소정의 주파수로 구동시키게 된다.In this configuration, the conventional air conditioner, as shown in Figure 2, for controlling the drive of the compressor drive unit 60 and the outdoor fan 71 for varying the operating frequency of the compressor in accordance with the temperature of the room An outdoor fan driving unit 70a is provided. When the compressor driving unit 60 determines the operating frequency of the compressor according to the indoor air conditioning condition by the indoor unit controller 10, the outdoor unit controller 50 outputs a predetermined control signal to the compressor driving unit 60, which is programmed in advance. By switching the driving of the six power transistors, which are switching elements, the three-phase alternating current having a phase difference of 120 ° is generated by the timing to drive the compressor 61 at a predetermined frequency.

상기와 같이 압축기(61)가 소정의 주파수로 구동되면 실외공기와 열교환되는 응축기에 고온고압의 냉매가 유입되므로, 냉매와 실외공기와의 열교환을 촉진시키기 위하여 실외팬(71)을 구동시킨다. 이와 같은 실외팬(71)의 구동시에 실외기제어부(50)는 압축기(61)를 구동하기 위한 전원주파수(이하, 운전주파수라 함)에 따라 소정의 속도로 구동되도록 실외팬구동부(70a)를 제어한다. 즉, 압축기(61)의 운전주파수가 높은 것(예를 들면 가변가능한 주파수범위의 절반이상)으로 판단되면 실외기제어부(10)에서는 소정의 릴레이스위치(RY1)를 온시켜 실외팬이 '강'에 해당하는 속도로 구동되도록 하고, 압축기의 운전주파수가 낮은 것(예를 들면 압축기의 운전주파수 범위내에서 그 절반이하)으로 판단되면 실외기제어부(50)는 소정의 릴레이 스위치(RY2)를 온시켜 실외팬이 '약'에 해당하는 속도로 구동되도록 실외팬에 소정전압을 인가한다.As described above, when the compressor 61 is driven at a predetermined frequency, the high temperature and high pressure refrigerant flows into the condenser that exchanges heat with the outdoor air, thereby driving the outdoor fan 71 to promote heat exchange between the refrigerant and the outdoor air. When the outdoor fan 71 is driven as described above, the outdoor unit controller 50 controls the outdoor fan driver 70a to be driven at a predetermined speed according to a power frequency (hereinafter, referred to as an operation frequency) for driving the compressor 61. do. That is, when it is determined that the operating frequency of the compressor 61 is high (for example, more than half of the variable frequency range), the outdoor unit controller 10 turns on a predetermined relay switch RY1 to turn the outdoor fan on 'strong'. When the driving frequency of the compressor is determined to be low (for example, less than half of it within the operating frequency range of the compressor), the outdoor unit controller 50 turns on a predetermined relay switch RY2 to open the outdoor unit. A predetermined voltage is applied to the outdoor fan so that the fan is driven at a speed corresponding to 'about'.

이와 같은 종래의 인버터형 공기조화기에 있어서, 실내온도에 따라 압축기의 운전주파수는 소정의 주파수범위내에서 가변되며, 이때 압축기의 운전주파수가 증가함에 따라 응축기로 유입되는 냉매의 온도도 증가하게 된다. 따라서, 압축기의 운전주파수가 증가됨에 따라 그와 연동되어 실외팬의 구동속도도 연속적으로 증가시켜 응축기내의 냉매의 열을 실외공기와의 열교환에 의해 방출시키도록 함으로써 실외기의 열교환효율을 증가시키는 것이다.In such a conventional inverter type air conditioner, the operating frequency of the compressor is variable within a predetermined frequency range according to the room temperature, and at this time, the temperature of the refrigerant flowing into the condenser increases as the operating frequency of the compressor increases. Therefore, as the operating frequency of the compressor increases, the drive speed of the outdoor fan is also continuously increased to increase the heat exchange efficiency of the outdoor unit by releasing heat of the refrigerant in the condenser by heat exchange with outdoor air.

그러나, 종래의 인버터형 공기조화기에서는 압축기의 운전주파수가 일정범위내에서 연속적으로 증가 또는 감소되도록 압축기 운전주파수를 가변시킬 수 있으나, 실외팬은 강약으로만 구동되기 때문에 압축기의 구동과 응축기의 열교환정도를 상관도가 높게 하여 응축기와 실외공기와의 열교환을 효율적으로 수행하지 못하여 공기조화기의 운전효율이 저하되는 문제점이 있었다.However, in the conventional inverter type air conditioner, the compressor operating frequency can be varied so that the operating frequency of the compressor is continuously increased or decreased within a predetermined range. However, since the outdoor fan is driven only by weak force, the compressor is driven and the heat exchanger of the condenser is changed. There was a problem that the operating efficiency of the air conditioner is deteriorated because the degree of correlation is not high and the heat exchange between the condenser and the outdoor air is not performed efficiently.

따라서, 공기조화기의 압축기와 실외팬의 구동속도를 가변시킬 수 있도록 압축기용 인버터와 실외팬용 인버터를 모두 채용한 공기조화기의 필요성이 대두되었는데, 이와 같은 공기조화기는 일본 특개평 6-165588에 개시되어 있다.Accordingly, there is a need for an air conditioner employing both a compressor inverter and an outdoor fan inverter to vary the driving speed of the compressor and the outdoor fan. Such an air conditioner is disclosed in Japanese Patent Application Laid-Open No. 6-165588. Is disclosed.

본 발명은 종래의 문제점을 해결하기 위하여 일본 특개평 6-165588에 개시된 실외팬에도 인버터가 적용된 공기조화기를 이용한 것으로, 본 발명의 목적은 공조조건에 따라 압축기 및 실외팬의 운전주파수를 가변시키도록 하는 인버터형 공기조화기에서, 실내온도와 설정온도와의 편차에 비례하는 압축기의 운전주파수를 설정하고 실외팬의 운전주파수를 압축기의 운전주파수에 동기시켜 가변시킴으로써, 공기조화기의 열교환효율을 증대시키도록 하는 공기조화기의 실외팬제어장치를 제공하기 위한 것이다.The present invention uses an air conditioner in which an inverter is applied to the outdoor fan disclosed in Japanese Patent Laid-Open No. 6-165588 to solve the conventional problems, and an object of the present invention is to vary the operating frequencies of the compressor and the outdoor fan according to air conditioning conditions. In the inverter type air conditioner, the heat exchange efficiency of the air conditioner is increased by setting the operating frequency of the compressor proportional to the deviation between the indoor temperature and the set temperature and changing the operating frequency of the outdoor fan in synchronization with the operating frequency of the compressor. It is to provide an outdoor fan control device of the air conditioner.

상기 목적을 달성하기 위한 본 발명은, 고온고압의 냉매를 토출하는 압축기와, 압축기로부터 유입되는 고온고압의 냉매와 실외의 공기를 열교환시키는 응축기, 응축기로 유입된 고온고압의 냉매와 실외공기의 열교환을 촉진시키는 실외팬, 압축기 및 실외팬을 가변구동시키도록 하는 직류전원을 소정의 주파수를 가진 3상 교류전원으로 변환하는 인버터를 구비하고, 압축기 및 실외팬의 운전주파수를 가변시키도록 하는 공기조화기에 있어서, 압축기의 구동속도에 따라 실외팬의 구동속도를 가변시켜 응축기의 열교환효율을 향상시키도록, 현재의 실내온도와 사용자가 설정한 설정온도에 의거하여 실내온도와 설정온도와의 온도편차를 산출하고, 산출된 온도편차가 크면 응축기로 유입되는 냉매의 온도를 높이기 위하여 운전주파수가 높도록 그리고 편차가 작으면 응축기로 유입되는 냉매의 온도를 상대적으로 덜 높이기 위하여 운전주파수가 낮도록 온도편차에 비례하여 압축기의 운전주파수를 30-120Hz의 범위에서 설정하며, 압축기의 운전주파수에 실외팬의 운전주파수를 동기시키는 제어부를 구비한 것을 특징으로 한다.The present invention for achieving the above object is a compressor for discharging a high-temperature high-pressure refrigerant, a condenser for heat exchange between the high-temperature high-pressure refrigerant flowing from the compressor and the outdoor air, the heat exchange of the high-temperature high-pressure refrigerant introduced into the condenser and the outdoor air And an inverter for converting a direct current power source for driving a fan, a compressor, and an outdoor fan to a three-phase AC power source having a predetermined frequency, and for varying the operating frequencies of the compressor and the outdoor fan. In order to improve the heat exchange efficiency of the condenser by varying the driving speed of the outdoor fan according to the driving speed of the compressor, the temperature deviation between the indoor temperature and the set temperature is set based on the current indoor temperature and the set temperature set by the user. If the calculated temperature deviation is large, increase the operating frequency to increase the temperature of the refrigerant flowing into the condenser and If the deviation is small, the operating frequency of the compressor is set in the range of 30-120 Hz in proportion to the temperature deviation so that the operating frequency is low to raise the temperature of the refrigerant flowing into the condenser relatively less. And a control unit for synchronizing frequencies.

제1도는 일반적인 공기조화기의 구성을 보이는 제어블럭도이다.1 is a control block diagram showing the configuration of a general air conditioner.

제2도는 종래의 공기조화기의 구성을 보이는 회로도이다.2 is a circuit diagram showing the configuration of a conventional air conditioner.

제3도는 본 발명에 따른 공기조화기의 구성을 보이는 상세회로도이다.3 is a detailed circuit diagram showing the configuration of an air conditioner according to the present invention.

제4도는 본 발명에 따른 실외팬 및 압축기 제어드라이브에 입력되어 변환되는 전압의 파형도이다.4 is a waveform diagram of a voltage input and converted into an outdoor fan and a compressor control drive according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 실내기제어부 20 : 실내온도감지부10: indoor unit control unit 20: indoor temperature detection unit

30 : 실내온도설정부 50 : 실외기제어부30: room temperature setting unit 50: outdoor unit control unit

60 : 압축기구동부 61 : 압축기60: compressor drive unit 61: compressor

70a,70b : 실외팬구동부 71 : 실외팬70a, 70b: outdoor fan drive 71: outdoor fan

62 : 압축기구동 인버터 72 : 실외팬구동 인버터62: compressor drive inverter 72: outdoor fan drive inverter

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명에 적용되는 공기조화기의 구성을 나타내는 제어블럭도이다.1 is a control block diagram showing the configuration of an air conditioner applied to the present invention.

본 발명에 따른 공기조화기의 제어장치는, 제1도에 도시된 바와 같이, 조화공간의 온도를 감지하는 실내온도감지부(20), 사용자로부터 희망하는 실내온도를 설정받는 실내온도설정부(30), 냉방운전 또는 난방운전 및 토출되는 공기의 풍향과 풍량 등을 선택받는 기능선택부(40), 실내온도감지부(20)에서 감지된 실내온도와 실내온도설정부(30)에 의해 설정된 설정온도를 비교하여 압축기의 운전주파수를 결정하는 실내기제어부(10)로 구성된 실내기와, 실내기제어부(10)로부터 제어신호를 입력받아 압축기(61) 및 실외팬(71)의 구동을 제어하도록 소정의 제어신호를 출력하는 실외기제어부(50), 실외기제어부(50)로부터 제어신호를 입력받아 압축기(61)를 실내온도와 설정온도와의 비교결과에 따라 실내기제어부(10)에서 설정된 운전주파수로 압축기(61)를 구동시키는 압축기 구동부(60), 실외기제어부(50)의 제어신호를 입력받아 압축기(61)의 운전주파수에 동기된 운전주파수로 실외팬(71)을 구동시키는 실외팬구동부(70b)로 구성된 실외기를 구비한다.The control apparatus of the air conditioner according to the present invention, as shown in Figure 1, the indoor temperature sensing unit 20 for sensing the temperature of the harmonic space, the indoor temperature setting unit for setting the desired room temperature from the user ( 30), the air conditioner and the heating operation and the air flow direction and the amount of air discharged by the function selection unit 40, the indoor temperature detected by the room temperature detection unit 20 is set by the room temperature setting unit 30 The indoor unit including the indoor unit controller 10 which determines the operating frequency of the compressor by comparing the set temperature, and receives a control signal from the indoor unit controller 10 to control the driving of the compressor 61 and the outdoor fan 71. The control unit receives the control signal from the outdoor unit controller 50 and the outdoor unit controller 50 that outputs the control signal, and sets the compressor 61 at the operating frequency set by the indoor unit controller 10 according to the comparison result between the indoor temperature and the set temperature. 61) when driving The outdoor unit includes an outdoor fan driving unit 70b which receives the control signals of the compressor driving unit 60 and the outdoor unit control unit 50 and drives the outdoor fan 71 at an operation frequency synchronized with the operation frequency of the compressor 61. do.

압축기 구동부(60) 및 실외팬구동부(70b)는, 제3도에 도시된 바와 같이, 각각 상용교류전원을 소정의 직류전원으로 변환시키는 컨버터부(미도시)와, 컨버터부로부터 직류전원을 인가받아 압축기(61) 및 실외팬(71)의 회전수를 제어하는 인버터부(62,72)로 구성된다.As shown in FIG. 3, the compressor drive unit 60 and the outdoor fan drive unit 70b each include a converter unit (not shown) for converting a commercial AC power source to a predetermined DC power source and a DC power source from the converter unit. And inverter units 62 and 72 for controlling the rotation speed of the compressor 61 and the outdoor fan 71.

인버터부는 압축기용인버터(62)와 실외팬용인버터(72)로 이루어지는데, 각각의 인버터는 스위칭소자인 6개의 파워트랜지스터로 구성된다. 인버터는, 각각의 파워트랜지스터가 실외기제어부(50)로부터 인가되는 타이밍신호에 의해 온/오프됨으로써, 직류전압을 120°의 위상차 및 소정의 주파수를 갖는 3상 교류전압으로 변환시켜 압축기(61) 및 실외팬(71)에 인가한다.The inverter unit consists of a compressor inverter 62 and an outdoor fan inverter 72. Each inverter is composed of six power transistors as switching elements. The inverter converts a DC voltage into a three-phase AC voltage having a phase difference of 120 ° and a predetermined frequency by turning on / off each power transistor by a timing signal applied from the outdoor unit controller 50, and the compressor 61 and It is applied to the outdoor fan 71.

본 발명에 따른 공기조화기는 상기와 같은 구성을 가진 인버터를 이용하여 압축기(61) 및 실외팬(71)에 인가되는 3상 교류전압의 운전주파수를 PWM(Pulse Width Modulation;펄스폭변조)방식을 이용하여 가변시킨다. 이와 같은 PWM방식을 제4도에 도시한 전압파형도를 참조하여 상세히 설명한다.The air conditioner according to the present invention uses a PWM (Pulse Width Modulation) method to operate the frequency of the three-phase AC voltage applied to the compressor 61 and the outdoor fan 71 by using an inverter having the above configuration. Variable to use. This PWM method will be described in detail with reference to the voltage waveform diagram shown in FIG.

PWM방식은 출력파형의 반싸이클 속에 다수의 펄스열을 만들고 그 펄스폭의 등가전압을 정현파상으로 변환시켜 저차 고조파가 적은 평활한 출력을 얻는 방식이다.PWM method is a method of obtaining a smooth output with low harmonics by making multiple pulse trains in half cycle of output waveform and converting the equivalent voltage of the pulse width into sine wave.

먼저, 제4도의 (a)에 도시된 바와 같이 일정한 주파수의 삼각파형을 정현파형의 신호와 비교하여 정현파형의 신호가 삼각파보다 큰 경우의 값을 취하면, 제4도의 (b)-(d)에 도시된 바와 같이 신호파의 진폭에 따라서 일정 폭을 갖는 펄스신호를 얻을 수 있게 된다.First, as shown in (a) of FIG. 4, when the triangle waveform of a constant frequency is compared with the signal of the sinusoidal waveform and the value of the signal of the sinusoidal waveform is larger than the triangle wave is taken, (b)-(d) of FIG. As shown in Fig. 2), a pulse signal having a predetermined width can be obtained according to the amplitude of the signal wave.

따라서, 실외기제어부(50)에서는 제4도의 (b)-(d)와 같은 타이밍신호를 각 출력단자 U-X, V-Y, W-Z에 출력하여 각 인버터의 파워트랜지스터를 온/오프시킴으로써 압축기(61) 및 실외팬(71)에 소정의 주파수를 갖는 3상의 교류전원이 인가되도록 한다.Therefore, the outdoor unit controller 50 outputs timing signals as shown in FIGS. 4 (b)-(d) to the respective output terminals UX, VY, and WZ to turn on / off the power transistors of the inverters. The three-phase AC power source having a predetermined frequency is applied to the fan 71.

상기와 같은 구성으로 이루어진 본 발명에 따른 실외팬제어장치가 적용된 공기조화기의 동작을 설명하면 다음과 같다.Referring to the operation of the air conditioner to which the outdoor fan control device according to the present invention having the configuration described above is as follows.

먼저, 공기조화기에 전원이 인가되고, 희망하는 운전의 종류, 즉 냉방운전 또는 난방운전, 희망하는 실내온도, 그리고 토출공기의 풍향 및 풍량등이 사용자에 의해 설정되면, 실내기제어부(10)는 운전신호를 받음과 동시에 실내온도감지부(20)를 통해 실내의 온도를 감지하고, 사용자에 의해 설정된 설정온도와 실내온도감지부(20)에서 감지된 실내온도와의 차를 산출한다.First, when the power is supplied to the air conditioner, and the type of the desired operation, that is, the cooling operation or the heating operation, the desired indoor temperature, and the wind direction and air volume of the discharged air is set by the user, the indoor unit controller 10 operates. Upon receiving the signal, the indoor temperature sensor 20 senses the indoor temperature, and calculates a difference between the set temperature set by the user and the indoor temperature detected by the indoor temperature sensor 20.

이와 같이 설정온도와 실내온도와의 차이가 산출되면, 실외기제어부(50)는 산출된 설정온도와 실내온도와의 차이에 의거하여 압축기를 구동시키기 위한 3상 교류전원의 주파수, 즉 압축기 운전주파수를 산출한다. 실외기제어부(50)는 실내온도와 설정온도와의 편차가 크면, 실내온도가 설정온도에 도달되는 시간을 단축시키기 위하여 압축기(61)의 운전주파수를 높게 설정함으로써, 압축기의 구동속도를 높이도록 하고, 실내온도와 설정온도와의 편차가 작으면, 압축기의 운전주파수를 낮게 설정함으로써, 압축기(61)의 구동속도를 낮추도록 한다. 본 발명에 따른 실시예에서는 압축기(61)의 운전주파수를 30-120Hz의 범위에서 가변설정한다.When the difference between the set temperature and the indoor temperature is calculated as described above, the outdoor unit controller 50 determines the frequency of the three-phase AC power source for driving the compressor, that is, the compressor operating frequency, based on the calculated difference between the set temperature and the indoor temperature. Calculate When the outdoor unit controller 50 has a large deviation between the indoor temperature and the set temperature, the operating speed of the compressor 61 is set high to shorten the time for which the indoor temperature reaches the set temperature, thereby increasing the driving speed of the compressor. If the deviation between the room temperature and the set temperature is small, the operating frequency of the compressor is set low, thereby lowering the driving speed of the compressor 61. In the embodiment according to the present invention, the operating frequency of the compressor 61 is variably set in the range of 30-120 Hz.

상기와 같이 실내온도와 설정온도와의 차이에 따라 압축기의 운전주파수가 결정되면, 실내기제어부(10)는 실외팬(71)의 운전주파수를 산출된 압축기의 운전주파수와 동일하게 설정한다. 즉, 압축기(61)는 운전주파수가 실내온도와 설정온도와의 차이에 따라 80Hz로 설정되면, 실외팬(71)의 운전주파수도 80Hz로 압축기(61)의 운전주파수와 동일하게 설정된다.When the operating frequency of the compressor is determined according to the difference between the indoor temperature and the set temperature as described above, the indoor unit controller 10 sets the operating frequency of the outdoor fan 71 to be equal to the calculated operating frequency of the compressor. That is, when the operating frequency of the compressor 61 is set to 80 Hz according to the difference between the indoor temperature and the set temperature, the operating frequency of the outdoor fan 71 is also set to the same as the operating frequency of the compressor 61 to 80 Hz.

따라서, 실외기제어부(50)는 실내기제어부(10)로부터 입력되는 제어신호에 따라 압축기 구동부(60) 및 실외팬구동부(70b)를 제어하여 압축기(61) 및 실외팬(71)이 설정된 운전주파수로 구동되도록 각 인버터(62,72)의 파워트랜지스터를 온/오프 스위칭시킨다.Accordingly, the outdoor unit controller 50 controls the compressor driver 60 and the outdoor fan driver 70b according to a control signal input from the indoor unit controller 10 to the operating frequency at which the compressor 61 and the outdoor fan 71 are set. The power transistors of the inverters 62 and 72 are switched on and off to be driven.

이와 같이, 실외팬(71)의 운전주파수를 압축기(61)의 운전주파수에 동기시켜 실외팬을 구동시키는 경우, 압축기에 의해 압축된 냉매의 열용량에 적절히 상응하여 실외팬이 적절한 양의 공기를 열교환시킬 수 있도록, 압축기의 구동속도에 맞추어 실외팬이 구동된다. 그러므로, 실외열교환기의 열교환효율이 높아지고, 이에 따라 공기조화기의 열교환효율도 높아질 수 있다.As described above, when the outdoor fan is driven by synchronizing the operating frequency of the outdoor fan 71 with the operating frequency of the compressor 61, the outdoor fan heats an appropriate amount of air in a manner corresponding to the heat capacity of the refrigerant compressed by the compressor. In order to achieve this, the outdoor fan is driven according to the driving speed of the compressor. Therefore, the heat exchange efficiency of the outdoor heat exchanger is increased, and thus the heat exchange efficiency of the air conditioner can be increased.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 공기조화기의 실외팬제어장치는 공조조건, 즉 실내온도와 설정온도와의 차이에 따라 가변되는 압축기의 운전주파수에 실외팬의 운전주파수를 동기시켜 실외팬의 구동속도를 가변시켜 실외열교환기와 실외공기와의 열교환을 증대시킴으로써, 공기조화기의 효율을 향상시키는 효과가 있다.As described in detail above, the outdoor fan control apparatus of the air conditioner according to the present invention is synchronized by the operating frequency of the outdoor fan to the operating frequency of the compressor that varies depending on the air conditioning conditions, that is, the difference between the room temperature and the set temperature By varying the driving speed of the fan to increase the heat exchange between the outdoor heat exchanger and the outdoor air, there is an effect of improving the efficiency of the air conditioner.

Claims (1)

Translated fromKorean
고온고압의 냉매를 토출하는 압축기(61)와, 상기 압축기(61)로부터 유입되는 고온고압의 냉매와 실외의 공기를 열교환시키는 응축기, 상기 응축기로 유입된 고온고압의 냉매와 실외공기의 열교환을 촉진시키는 실외팬(71), 상기 압축기(61) 및 상기 실외팬(71)을 가변구동시키도록 하는 직류전원을 소정의 주파수를 가진 3상 교류전원으로 변환하는 인버터(60,70b)를 구비하고, 상기 압축기(61) 및 상기 실외팬(71)의 운전주파수를 가변시키도록 하는 공기조화기에 있어서, 상기 압축기(61)의 구동속도에 따라 상기 실외팬(71)의 구동속도를 가변시켜 응축기의 열교환효율을 향상시키도록, 현재의 실내온도와 사용자가 설정한 설정온도에 의거하여 실내온도와 설정온도와의 온도편차를 산출하고, 산출된 온도편차가 크면 상기 응축기로 유입되는 냉매의 온도를 높이기 위하여 운전주파수가 높도록 그리고 편차가 작으면 응축기로 유입되는 냉매의 온도를 상대적으로 덜 높이기 위하여 운전주파수가 낮도록 온도편차에 비례하여 상기 압축기(61)의 운전주파수를 30-120Hz의 범위에서 설정하며, 상기 압축기(61)의 운전주파수에 상기 실외팬(71)의 운전주파수를 동기시키는 제어부를 구비한 것을 특징으로 하는 공기조화기의 실외팬제어장치.A compressor 61 for discharging a high temperature and high pressure refrigerant, a condenser for exchanging heat of high temperature and high pressure refrigerant introduced from the compressor 61 and outdoor air, and promoting heat exchange between the high temperature and high pressure refrigerant introduced into the condenser and outdoor air And an inverter (60, 70b) for converting a direct current power source for driving the compressor (61) and the outdoor fan (71) to a three-phase AC power source having a predetermined frequency. In the air conditioner for varying the operating frequency of the compressor 61 and the outdoor fan 71, the heat exchange of the condenser by varying the drive speed of the outdoor fan 71 according to the drive speed of the compressor 61 To improve the efficiency, the temperature deviation between the room temperature and the set temperature is calculated based on the current room temperature and the set temperature set by the user. If the calculated temperature deviation is large, the temperature of the refrigerant flowing into the condenser is increased. The operating frequency of the compressor 61 in the range of 30-120 Hz is proportional to the temperature deviation so that the operating frequency is low so that the operating frequency is low so that the operating frequency is low to increase the temperature of the refrigerant flowing into the condenser. And a control unit for synchronizing the operating frequency of the outdoor fan (71) with the operating frequency of the compressor (61).
KR1019960004227A1996-02-221996-02-22 Outdoor Fan Control Unit of Air ConditionerExpired - Fee RelatedKR0182717B1 (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
KR1019960004227AKR0182717B1 (en)1996-02-221996-02-22 Outdoor Fan Control Unit of Air Conditioner

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
KR1019960004227AKR0182717B1 (en)1996-02-221996-02-22 Outdoor Fan Control Unit of Air Conditioner

Publications (2)

Publication NumberPublication Date
KR970062567A KR970062567A (en)1997-09-12
KR0182717B1true KR0182717B1 (en)1999-05-01

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KR1019960004227AExpired - Fee RelatedKR0182717B1 (en)1996-02-221996-02-22 Outdoor Fan Control Unit of Air Conditioner

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